Turned it off and on a dozen times at least. Reinstalled CB Reader from CNET several times. When I originally clicked on a file I only got a black cbr page in the taskbar, nothing on screen. After reinstalling if I click on a cbr it beings up a setup for cbr, which is already installed and set up; when I click on a cbz I get a blank page and a message to find an app at Microsoft store. When I click that it again asks me to set up CB reader.